<?php
/**
 * Clear the existing session.
 */
 


session_start();

$log_unique_id = sprintf("%04x", rand(0,0xffff));
function log_message($msg, $also_debug = true) {
	global $log_unique_id;
	$msg = "[$log_unique_id] $msg";		// append a unique ID to help us track requests
	
	$fp = fopen("php.log", "a");
	fwrite($fp, date("Y-m-d H:i:s") . " header.php: $msg\n");
	fclose($fp);
	
	// also echo to debug
	if ($also_debug) {
		echo "\$('response').innerHTML = \"" . htmlentities($msg) . "\";\n";
	}
}

function local_die($message) {
	log_message("DEATH: $message");
	die($message);
}

// make sure that the db exists for stored_events
$db = new PDO('sqlite:stored_events.db') or local_die("could not open db");
$s = $db->prepare("SELECT * FROM stored_events");
if (!$s) {
	// create the table
	$q = $db->query("CREATE TABLE stored_events (
			id INT AUTO_INCREMENT PRIMARY KEY,
			page_id VARCHAR(64) NOT NULL,
			event_name VARCHAR(64) NOT NULL,
			arg0 BLOB
		);") or local_die("could not create table: " . print_r($db->errorInfo(), true));
	log_message("table for stored_events created", false);
}

function require_session($var, $default = "") {
	return isset($_SESSION[$var]) ? $_SESSION[$var] : $default;
}

function require_get($var, $default = "") {
	return isset($_GET[$var]) ? $_GET[$var] : $default;
}

class IamlRuntimeException extends Exception {
	public function __construct($message = "") {
		parent::__construct($message);
	} 
}


log_message("clear_session.php? " . print_r($_GET, true));

foreach ($_SESSION as $k => $v) {
	$_SESSION[$k] = "";
}

echo "ok";
log_message("clear_session.php completed");

